There's a plague of ghosts in town! The kids in Otto's class are suddenly being haunted, and a dead Spanish bullfighter is trying to make himself at home with Otto and his aunt. Three house ghosts and a talking bat are already more than enough - Otto really doesn't need another resident ghost. But where do all these lost souls come from? And how do they get rid of them? Fortunately, his friend, Grim Reaper Harry, has good contacts in the underworld.